Problem with resize game in canvas on start and fullscreen mode 4.14 ver

Hello, im have next problem with UE 4.14.1-3 ver. after build HTML5 project, when i going in my project page i get trouble with my game resolution in canvas, if i after problem click on fullscreen, game resize sometimes work, but other time this work incorrect. Sometimes on start this i get good resolution, but after going on fullscreen mode i get resolution problem. Im trying use clean project and i get this problem too. (i`m use chrome, edge, opera browsers). if i change browser window size manually , game resize good work.
screenshots with problem in attach.

On load:

On Fullscreen Mode

after change browser window size manually:

Sorry for my english.
Thank you for attention.

yes, i have this problem on ver 4.14.3 too, on 4.11.2 it`s ok.

Take a look at these:

and