Hi! These are some of the bugs I've noticed in BW, and some ideas!
- If you drink an invisibility potion in front of somebody your armor will become invisibile! If you aren't this will happen! Proof: https://imgur.com/a/0P50Emp
1.5) What I've tried to do to fix it: --> Place plugins that hide armor when you're invisible BetterINvisibility, InvisibilityPlus, only a skript has done the job taking the armor when you're invisibile and giving you back,when you're visible again! --> Tried to make true "Disable-armor-packets"
Second issue: When I change language this happens: https://imgur.com/a/YMow660 I tried connecting the mysql, but didn't fix it it gave me the "connection reset by peer" /bw lang en.
Third issue, my potions in the shop are water_bottle, and when in inventory too: https://imgur.com/a/0xp0BR8
I've done nothing to try to fix it:
Fourth issue: When you respawn your hotbar's messed up https://imgur.com/a/HRykEsB
Haven't tried anything to fix that
Fifth: Sometimes as a spectator you'll not see some players (after the player is killed and he respawns, or sometimes just you don't see.)
Sixth:
It says 2 and 10 diamonds, but it's cost lower, like 2 4 8 16) not 30...
Seventh: 
You can place how many swords you want here, a "reproductive" bug.
Eigth: If you buy a sword from the shop, isn't unbreakable
Ninth: tablist Team alignment And more: #522 (closed)
Ideas: Knockback and TNT damage like Hypixel The Auto-Tower build> Party Games (Private plugin AdDON) not a skript or anything else, a different plugin! (I would buy that!) Fireballs like Hypixel. Generators splitting for teams!