First off i tested this in 1.12.2 as well as in 1.13 pre.
And at 1.12.2 and below it works without any problems.
I only noticed the bug because i always do this and it stopped working.
One more thing. In prior versions to 1.13 pre u had NO delayed movement after u press w,a,s or d at the same time as sprint.
But in this version it pauses for around 1 second before it starts moving and if u jump in this time it wont move at all.
After testing this bug on my Windows partition it seems to ONLY occur at my Linux partition and only at 1.13 pre versions.