Thanks for reporting that issue. It's an incompatible change from MC 1.14.3-pre4 to 1.14.3 which breaks RM rendering until the RM is updated to deal with it.
Luckily, I've already fixed this particular issue yesterday while I was also updating other parts of RM to 1.14.3 and the fix will land in -b3 (which will drop 1.14.2 in favor of 1.14.3).
You can get a snapshot for it at: https://minio.johni0702.de/replaymod/replaymod-1.14.3-2.2.0-b2-6-g214da6b.jar
Be warned though that I have not yet ran that build, not even a single time, so other issues may arise.