Recently in the lab updated the HTML5 receiver (version 2.3) on my storefront servers. After which hit issues with my connection going “in and out”.
Turns out my patching wasn’t up to scratch. XenApp 6.5 environment and moving hotfix rollup pack 7 (per CTX129229) resolved the issue.
What was instructive was enabling HTML5 logging per https://support.citrix.com/article/CTX217352
What did help me gather from it was it was session reliability-related. Sure enough when I switched it off all worked. Ultimately though did want to leave enabled so updating to latest HRP resolved but the HTML5 logging was very useful on this occasion as reasonably negligible so a good takeway