Raid: bar and spawning[of the mobs]

I was in a raid and had defeated wave three in normal difficulty, as the raid bar was loading I paused the game and shut the computer lid, an hour later I turned on the computer and clicked play, and I expected the raid bar to resume loading but it seemed to be frozen (the rest of the game was working normally). after playing for a while, the bar seemed to have a bit more loaded no it than before, as if it was loading extremely slowly. now though, the bar has completely gone, but I still have vindicators and pillagers show up with flags on them.

If you want to duplicate this bug, just do a normal raid, get to round three, and pause the game. DO NOT EXIT, it might work as normal, resume playing the next day, and see what happens.