Some products can't be edited/searched for after update to Joomla 3.8.2

[wuergezwerg]

Hi there,

some days ago I updated VM to 3.2.6 and everything worked fine.

But after the update from Joomla 3.7.5 to 3.8.2 there are some problems:

• I can't edit some products in the BE, it just stops loading after the left menu (form tag and the 2 following divs opened). In FE you can open it normally
• The same products can't be found by searching in FE and BE (fixed by updating to VM 3.2.8 )
• When I choose a product category it doesn't list all products, in some categories none
• In the browser console there is an error from the Bootstrap tooltip (TypeError: Cannot read property 'VERSION' of undefined)

Anyone experienced these problems or has an idea how to fix this ?
Is there a way to repair/reinstall VM without loosing the data ?

If you need any more information please ask 

VirtueMart 3.2.6 3.2.8
Joomla 3.8.2
PHP 7.0.25