Meh! Happened a while ago and there has been a SIN issued just recently.
Inlet Barrier Filters can be hard to substantiate for certification due to the variance of "snow".
On the H145 it is a fairly simple operation to remove the filter for winter. Remove filter and housing assembly, install blanking plate over inlet grid and install screen on firewall.
The H145 does have room for finger trouble of course if it is allowed to develop!
Problem with many of these anti-ice filters is that falling snow can collect on or around them. When comes loose it can then get ingested as a "mouthful" and the sudden amount of water puts the flame out. We had the same thing on the Puma HC1, over and above icing there were separate, quite restrictive limits for falling snow.
Chalk and cheese between 330/332 and H145.
BTW an "anti-ice filter" is part of the fuel system.
And an "Inlet Barrier Filter" has nothing to do with protection from ice - an Arriel engine on it's own has no anti-ice requirement.