Backend search in products - resulting empty blank page how to reset last search?

[nikos83]

Hi, 
I have wired problem after I search some word in backend on products I got empty white page, can not see any information.

Re-login clear cache empty store cache doesn't help. What's the way to reset search in products ? 

When I turn shop in debug mode I can see searched products, and on debug model search works well. Only when I disable debug model then I got empty white page. Maybe this problem cased some special characters used in products name because is only persists if I search this products.

On debug mode I have warning like this:

Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in public_html/src/Adapter/EntityMapper.php on line 99

My shop was update from 1.6 to 1.7 long time ago but there was no problem before