I'm using a MYPHONEMY27 Android phone.
*NOTE: TRY SEARCHING "MCPE 0.14.3 and 0.15.0 beta 1 LAVA TEXTURE bug" to see the difference*
If you searched the issue above, you might observe that the inside is visible. This WATER TEXTURE bug affects the OUTSIDE. It makes the outside look like an undersea❓ background. The INSIDE looks NORMAL, though. Screenshots below. Look for the differences between the issue above.
I am afraid we can not reproduce this bug in the recent version. Please update affected versions if this bug still occurs.