There have been several reports (and anecdotal experience) of Reinhardt earth-shatter and charges being block by destructible objects and other unexpected terrain. This bug began on patch 1.45 and is likely related to the following fix.
In the case of destructable objects, it often appears that the charge is stopped if the object enters the hitbox in which it would usually take 50 damage. Since this is well outside of the usually hitbox that would cause a (non-breakble) object to cancel reins charge, this means that often there can be a significant unexpected distance away from the object for the bug to occur.
Per each instance, sources inconsistent whether an unexpected block is applied to charges, earthshatters, or both. However it does seem in general that stairs block both, and destructables block charges where applicable. It also seems that not all destructibles will infact block charges.
This behavior also seems consistent in all game-modes. It is very jarring and limits reins mobility and ult effectiveness.
Noted locations and objects:
Petra:
Breakable floor
Hanumura:
Railings on the right side from defenders spawn (The flank jump route)
Numbani:
Bridge Railings
Route 66:
Every Street Sign
Nepal:
Stairs leading up to capture point on Shrine
Kings Row:
3rd Point left side between boxes and room with health pack as attacker
Hollywood:
Cactuses
Sources:
Rein charge on Numbani bug
Reinhardt Charges broken
Rein+Staircases=no
Shatter bug kings row
Reinhardt charge on petra
Reinhardt Charge in Petra is broken
[Petra][FFA][Rein] Charge not working anymore accross central place
This part of the Petra and Reinhardt doesn't go well together
I will update with more information as more people post about this.