Hi,
same issue here, was curios if you solved the issue.

tried diff versions of ST 0.74, 0.72
disabled http2 in ALB
error persist if accessing docker image without ALB but site loads faster  and don’t get stucked  in wss error loop . triend Chrome, Firebox, Safari
-healthz responds ok using ALB
-using chrome incognito page seems to loads faster  for the first time
-ALB logs give a 404 for GET …443/static/js/main.cf1968bf.chunk.js.map HTTP/1.1

firefox reports: Firefox can’t establish a connection to the server at wss://server/stream. main.cf1968bf.chunk.js:2:320763
The connection to wss://server/stream was interrupted while the page was loading. main.cf1968bf.chunk.js:2:320763
Any idea would be appreciated