or it stopped rendering them, you can see where the rapids are, ie where they switch in elevation.

server latest log:

http://paste.ubuntu.com/p/brMYdhH7NW/

server debug log:

http://paste.ubuntu.com/p/QjDChzbHcV/

client latest log:

http://paste.ubuntu.com/p/2DzddkZC7T/

client debug log:

NaN

modlist:
http://paste.ubuntu.com/p/RT66vpBGSZ/

screenshot:

Having the same problem this is a bit hugely annoying and there is also a bug now with https://pastebin.com/ dynamic surrounding as the missing streams cause an error with it

Rolling back to farseek 1.12-2.3.1 and streams 1.12-0.4.4 restored the streams as seen in

https://pastebin.com/C6fEXQi0 ups sry my bad XD

Thanks guys for letting me know. I suspect a change in the generated names for the river blocks is causing this problem when upgrading existing worlds. I'll confirm when I get back to my home computer. Please rollback for now I'll try to fix this soon.

p.s. @SirAron111 can you fix your pastebin link to point to your actual error log? Thanks.

Just released an emergency bugfix 0.4.6 for this issue, please let me know if it restores the missing streams. Note that the "rapids" will still act buggy if upgrading a 0.4.5 world; for best results apply the upgrade to the 0.4.4 backup world created by Forge.