Smoothing landscape removes landscape collision in smoothed areas

Smoothing user's landscape breaks collision, causing player to fall through the ground at points that have been smoothed. Resampling landscape fixes the error until smooth tool is used again.

Regression (uknown) issue (unknown) occur on 4.10.4

Note Error did not occur in 4.9.2. May be related to [Link Removed]

1. Download, unzip, open project at link:

[Link Removed]

1. Press PIE
2. move character forward

Results

Player falls through landscape

Expected

Landscape collision remains in tact, player walks across landscape