How does the fibreglass mesh deal with cracks?

When laying the fibreglass mesh, we tighten the Fiber Glass and stick it on the bottom cover mortar. Use a trowel to press the fibreglass mesh into the surface of the mortar from the middle to the surrounding area. It should be flat and compacted. Wrinkles on the Fiber Glass are strictly prohibited. If there are cracks, how does the Fiber Glass deal with it? Let's introduce it in detail.

Expansion joints and decorative joints can be set for external wall insulation. Corresponding treatment should also be done at the structural settlement joints and temperature joints. When leaving expansion joints, the grid strips should be put in during the plastering process, and removed after the mortar is initially set, and the seam edges should be trimmed.

Fill the seam with foamed polyethylene round rods as backing, with a diameter or width of 1.3 times the seam width, and then fill the building sealant twice, with a depth of 50-70% of the seam width. Settle the settlement joints and temperature joints with metal covers according to the seam width and position, and fasten them with nails or screws.

Decorative seams should be processed into concave or convex shapes according to the facade effect of the architectural design. The convex shape is called the decorative line, which is preferably embodied by polystyrene board. Here, the Fiber Glass and the plastering mortar are not separated. When pasting the polystyrene board, first draw a line to mark the position of the decorative line, and then paste the processed polystyrene board line to the corresponding position.

When the line protrudes from the wall more than 100mm, mechanical fixings need to be added. The surface of the line is treated according to the ordinary external insulation plastering method. How does the Fiber Glass deal with the cracks?