Box API call returns large invalid access token

We are using BoxSDK for Salesforce and BoxPlatformApiConnection class to get the access token and sometimes the API call returns a larger invalid access token. It happens sporadically 

Below is an example of the email we are receiving:

'BoxUtil' for job id '7074w00009yfQRE' : Update failed. First exception on row 0 with id a0B4A00001356NmUAI; first error: STRING_TOO_LONG, access token: data value too large: 1!uCLAlRKgw4pZdZEPy9xuh... Apex script unhandled exception by user/organization: (Salesforce Org ID) Failed to invoke future method 'public static void setAccessToken()' on class 'BoxUtil' for job id '7074w00009yfQRE'  caused by: System.DmlException: Update failed. First exception on row 0 with id a0B4A00001356NmUAI; first error: STRING_TOO_LONG, access token: data value too large: 1!uCLAlRKgw4pZdZEPy9xuh0oPEkHMZikAs9HwbpTXj0JWyytjBUoO4lmBh23ta7zodppMc1ESVx8lCT-eSh6Lvi6X-SYrUkL4_wQgvUN2QRjZ8jxdhuSGw3k91pnSr7A5ZkAkECvlKI6_RDad3UH4oBma3r1iTmcDh-ft-mBNgoerlFrLXptx5zEnZt7L1jxMlGxg1jKFDpbMXNkHIdd7MIigrcRoJzoyZDOKfr2cUAEar8_v7ZHHouytepOHMTaFWNyvbrMufMlTIemIPyz5yZyjhm6qqilbDKQWKXEeypbJGwrz89ZVXLstYVmDb1ki7GXXlx43q2eCUIUoA_KlYiOHXFNEp_2gq9fTLawRZQsL4mbb1fUrJYWCTd2f8ZkaZAjNQgvoToIu8m5CmYgMfPvws1C_K9Zu8SD7u3bz502EjpirGbquHlzPHp3ecTXImhwAwxoT5D2uzWPdz81Ljxy34ysmI2xJoy7isR > Q7xW0oB-g4DzA9uVfMXYF5QDX5OxBqUqHESg1uHG16nm_iXIRpBuX_qMTJfEhBVXTycstvtAe5qrqTHORlOCPqU27_BqDoUpfdgDLlEiQqoynNT4CLngIjkPgG13LeV0kqiPnk6yS1JG9YLMWevpk2H7

(max length=50): [access_token__c]

Class.BoxUtil.setAccessToken: line 29, column 1