Minecraft: 1.12.2
Forge: 14.23.5.2838

Mods: 3
Mantle-1.12-1.3.3.55
TConstruct-1.12.2-2.12.0.135
yoyos_1.12.2-1.3.0.21

Something bork'd, as whenever I attempt to use a Yoyo in my Main-hand slot... I toss it but then it comes back to me in like a split second.

If I die, I can use Yoyos in my Main-hand slot but the moment I switch it to a different spot on the hotbar... it bugs out and I can't toss it anymore.

Now if I only have a Yoyo in my Off-hand slot, I'm able to use it but it won't let me if there's something in my Main-hand, such as a block or a sword. Sometimes it still won't let you toss a Yoyo in your Off-hand slot despite your Main-hand being empty.

Here's the weird part, if you duel-wield Yoyos... you can toss the Main-hand Yoyo but the moment I remove the Off-hand Yoyo? You're unable to toss the Main-hand Yoyo.

This issue didn't occur in 'yoyos_1.12.2-1.2.2.20.jar'.