tippy don't work inside th field on bootstrap table

[MarcoZucc]

Bug description

I’am a problem with tippy.js used inside a table created with bootstrap table https://bootstrap-table.com/ and bootstrap 4.0 and I suppose that is a bug of tippy Is I use tippy inside th or td field it don’t work and console don’t return me anything, but outside of table works perfectly. I suppose that is a bug or a problem with position and flexbox of bootstrap I have try to: Use different jquery version, change proos of tippy in particular appendto and sticky but with no result

Reproduction

I have created a js fiddle that reproduce my situation

https://jsfiddle.net/w9mb80vs/2/

[micktaiwan]

it does not work in any th element