Is there a limit for texture dimension which can be imported to TextureArray?

Hi,sorry my poor english, in ue 4.27 i find i can create TextureArray default ,
but ,when i import 8k texture into texturearray, it suopport only 8 textures,ue has crashed in ninth texture。and it support only 32 textures whick 4K
this is pic:

so。 is there any suggests can fix this?
hope reply received soon······