Calling operator that saves bmesh freezes blender forever

Archive Python API
1

I setup some shader to run on top of blender viewport and connected it’s update to SpaceView3D.draw_handler_add. The idea was that shader will only work in EDIT mode and if user exists it then it will automatically trigger some operator.
Line that freezes Blender is bm.to_mesh(context.object.data) although it doens’t freeze right away.

What I’ve found that if I call operator that edits mesh from bmesh then it freezes Blender entirely.
Any ideas to work around that? Could that be a bug?
Currently as a workaround I plan to move operator’s code to some function and call it insteadf because bm.to_mesh(context.object.data) doesn’t seem to freeze Blender when it’s called from handler without operator.

Blender version: 3.5
Easy way to reproduce (create default scene, make sure cube is selected, run the script):

import bpy
from bpy.types import SpaceView3D
import bmesh

class TestHandler:
    installed = None

    @classmethod
    def install(cls, context):
        handler = cls()
        cls.installed = SpaceView3D.draw_handler_add(
            handler, (context, ), "WINDOW", "POST_VIEW"
        )

    @classmethod
    def uninstall(cls):
        try:
            SpaceView3D.draw_handler_remove(cls.installed, "WINDOW")
        except ValueError:
            pass
        cls.installed = None

    def __call__(self, context):
        obj = context.object
        if obj.mode != "EDIT":
            TestHandler.uninstall()
            bpy.ops.test.test()
            print('HANDLER CALL FINISHED') # never printed
            return
        
        print('HANDLER FINISHED')

class TestOperator(bpy.types.Operator):
    bl_idname = "test.test"
    bl_label = "test"

    def execute(self, context):
        print('TEST OPERATOR CALLED')
        bm = bmesh.new()

        # WITHOUT THIS LINE IT DOESN'T FREEZE
        bm.to_mesh(context.object.data)

        # still printed
        print('TEST OPERATOR FINISHED')
        return {"FINISHED"}
    
class TestSetupOperator(bpy.types.Operator):
    bl_idname = "test.test_setup"
    bl_label = "test"

    def execute(self, context):
        print('TEST SETUP OPERATOR CALLED')
        TestHandler.install(context)
        return {"FINISHED"}


bpy.utils.register_class(TestOperator)
bpy.utils.register_class(TestSetupOperator)
bpy.ops.object.mode_set(mode="EDIT")
bpy.ops.test.test_setup()
# freezes on the next step
bpy.ops.object.mode_set(mode="OBJECT")