Just wondering. A link is fine but you can just describe them.
From Glitch City Laboratories
This category is for articles about glitches in Pokémon Ultra Sun and Ultra Moon.
Pages in category "Pokémon Ultra Sun and Ultra Moon glitches"
The following 5 pages are in this category, out of 5 total.
Ion Deluge glitch
Litten freeze glitch
Live Competition Curse/Forest's Curse/Power Trick/String Shot glitch
Mantine Beach Move Tutor glitch
Wide Guard glitch
Source: Glitch City Laboratories
Those are the only known glitches but are fixed in updates.