I'm having some problems with the replay viewer. After I play the camera path or jump to a different time in the timeline, I can't move around anymore. It only seems to happen when a screen with "joining world" and "loading terrain" (with a dirt background) appears. The same thing happens with a different replay file. I have never had this issue with previous versions of the Replay Mod.
When it happens, I can still look around, play the camera path and add and remove position/time keyframes.
The following thread is probably related to the issue:
https://www.replaymod.com/forum/thread/2540
OS: Windows 10 (64x)
Java: 1.8.0_51 64bit
Mods: fabric-api-0.3.0+build.185 , replaymod-1.14.2-2.2.0-b1
Fabric version: 0.5.0.30 (vanilla)
I hope this helps, would be awesome if it got fixed.