Intermittent slow uploads

Hi,

We are experiencing intermittent slow uploads to box. 

The problem is more likely to happen with the API, but has happened across both the API and uploading using Web. When the problem is happening the Box connection diagnostics will show upload failure to multiple box host names. (but download is always OK)

Here is an example of the upload failing;

PART 3 of 3: Testing upload to different Box hostnames...
-------------------------------------------------------------------------
Checking upload speed to https://upload.app.box.com
The 9.8KB file loaded in 1117ms (72 kbps).
The 97.7KB file loaded in 5791ms (138 kbps).
Upload failed or timed out for "https://upload.app.box.com" on a 976.6KB file (30s timeout)
Aborting the remainder of the upload tests for https://upload.app.box.com due to upload failure.
-------------------------------------------------------------------------
Checking upload speed to https://upload.ent.box.com
The 9.8KB file loaded in 431ms (186 kbps).
The 97.7KB file loaded in 603ms (1327 kbps).
The 976.6KB file loaded in 3619ms (2211 kbps).
Upload failed or timed out for "https://upload.ent.box.com" on a 9.5MB file (30s timeout)
-------------------------------------------------------------------------
Checking upload speed to https://upload.app.boxenterprise.net
The 9.8KB file loaded in 440ms (182 kbps).
The 97.7KB file loaded in 1366ms (586 kbps).
The 976.6KB file loaded in 5124ms (1561 kbps).
Upload failed or timed out for "https://upload.app.boxenterprise.net" on a 9.5MB file (30s timeout)
-------------------------------------------------------------------------
Checking upload speed to https://upload.app.boxcn.net
The 9.8KB file loaded in 481ms (166 kbps).
The 97.7KB file loaded in 1956ms (409 kbps).
Upload failed or timed out for "https://upload.app.boxcn.net" on a 976.6KB file (30s timeout)
Aborting the remainder of the upload tests for https://upload.app.boxcn.net due to upload failure.
-------------------------------------------------------------------------
Checking upload speed to https://fupload-g-sjc.app.box.com
The 9.8KB file loaded in 289ms (277 kbps).
The 97.7KB file loaded in 435ms (1839 kbps).
The 976.6KB file loaded in 584ms (13699 kbps).
The 9.5MB file loaded in 1156ms (69204 kbps).
4 out of 4 requests to "https://fupload-g-sjc.app.box.com" succeeded.
Upload Speed: 69204 kbps
-------------------------------------------------------------------------
Checking upload speed to https://fupload-g-lax.app.box.com
The 9.8KB file loaded in 259ms (309 kbps).
The 97.7KB file loaded in 371ms (2156 kbps).
The 976.6KB file loaded in 703ms (11380 kbps).
The 9.5MB file loaded in 1193ms (67058 kbps).
4 out of 4 requests to "https://fupload-g-lax.app.box.com" succeeded.
Upload Speed: 67057 kbps
-------------------------------------------------------------------------
Checking upload speed to https://fupload-g-jfk.app.box.com
The 9.8KB file loaded in 413ms (194 kbps).
The 97.7KB file loaded in 664ms (1205 kbps).
The 976.6KB file loaded in 841ms (9512 kbps).
The 9.5MB file loaded in 3408ms (23474 kbps).
4 out of 4 requests to "https://fupload-g-jfk.app.box.com" succeeded.
Upload Speed: 23474 kbps
-------------------------------------------------------------------------
Checking upload speed to https://fupload-g-iad.app.box.com
The 9.8KB file loaded in 394ms (203 kbps).
The 97.7KB file loaded in 642ms (1246 kbps).
The 976.6KB file loaded in 806ms (9926 kbps).
The 9.5MB file loaded in 1533ms (52185 kbps).
4 out of 4 requests to "https://fupload-g-iad.app.box.com" succeeded.
Upload Speed: 52185 kbps
-------------------------------------------------------------------------
Checking upload speed to https://fupload-tn.app.box.com
The 9.8KB file loaded in 326ms (245 kbps).
The 97.7KB file loaded in 382ms (2094 kbps).
The 976.6KB file loaded in 645ms (12403 kbps).
The 9.5MB file loaded in 1070ms (74766 kbps).
4 out of 4 requests to "https://fupload-tn.app.box.com" succeeded.
Upload Speed: 74766 kbps
-------------------------------------------------------------------------
Checking upload speed to https://fupload-ec2euc1.app.box.com
The 9.8KB file loaded in 2811ms (28 kbps).
The 97.7KB file loaded in 8414ms (95 kbps).
Upload failed or timed out for "https://fupload-ec2euc1.app.box.com" on a 976.6KB file (30s timeout)
Aborting the remainder of the upload tests for https://fupload-ec2euc1.app.box.com due to upload failure.
-------------------------------------------------------------------------
Checking upload speed to https://fupload-ec2apne1.app.box.com
The 9.8KB file loaded in 1957ms (41 kbps).
The 97.7KB file loaded in 8572ms (93 kbps).
Upload failed or timed out for "https://fupload-ec2apne1.app.box.com" on a 976.6KB file (30s timeout)
Aborting the remainder of the upload tests for https://fupload-ec2apne1.app.box.com due to upload failure.
=========================================================================

We have opened a support ticket, 8 days ago, but so far the only recommendation is clear browser cache (which is really not the issue) 

We have spoken to our ISP corporate support, they are sympathetic, but see it as an issue outside their network. (which it probably is, and I can't diagnose that without help from box.support) 

Does anyone have an idea of how to help?

When the problem happens it's bad news for us.