Yes, this behavior just appeared after Apple Developer Support resolved a problem I (and others) reported wherein all testers were shown as "No Builds Available" in App Store Connect's TestFlight pages. I've sent the senior Advisor handling my case screen shots to document the "old build" issue.
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I have a support case in with Developer Support... I'll post here if they get me a resolution.
Seeing the same issue... I have done many TestFlight internal testing releases in the past... this is infuriating... work all day to get a build ready for a client and I can't release it for testing. Under TestFlight > App Store Connect Users > Builds it shows a green dot and says "Testing Expires in 89 Days".