All of your blocks are using the old system, which doesn't work with timeline blocking. Blocks were fixed to correctly set the user when blocking (happened about a month ago).
This image is what your (admin) blocks page looks like:
Notice all the blocks are inbound to yourself. This is because they're legacy blocks which didn't place user IDs properly.
This is what the block page should look like:
Delete all these blocks manually and then redo them (annoying I know, there was no other way though) and it should work properly.
I've checked the other users who commented before me here and it is the same case.
All of your blocks are using the old system, which doesn't work with timeline blocking. Blocks were fixed to correctly set the user when blocking (happened about a month ago).
This image is what your (admin) blocks page looks like:
Notice all the blocks are inbound to yourself. This is because they're legacy blocks which didn't place user IDs properly.
This is what the block page should look like:
Delete all these blocks manually and then redo them (annoying I know, there was no other way though) and it should work properly.
I've checked the other users who commented before me here and it is the same case.