Yes, there were a lot of beats (from memory) I used 3 or 4 'drum instruments?' per block with all blocks including a drum beat except the last two and most incl

Yes, there were a lot of beats (from memory) I used 3 or 4 'drum instruments?' per block with all blocks including a drum beat except the last two and most included two or three 'instruments' per block. Tested using FF 91.10 ESR on Linux Mint 20.3. Altering the tempo didn't have any impact. HTH.