Missiles hit through flares, behind cover, lock-on indicator disappears

• Missiles ignore flares/countermeasures. After locking onto a target and firing, the missiles fly straight through deployed flares without being diverted, even though the aircraft correctly used countermeasures. As a result, flares don't do their job against the Igla. (old bug since IGLA exist)
• Lock-on indicator disappears. During target lock/tracking, the lock-on indicator vanishes from the screen, making it impossible to tell whether the target is still being tracked or lost. (fresh bug, from 3 season)
• Missiles hit targets through obstacles / below radar. The Igla can reach a jet or helicopter even when the target is behind cover or flying low below the radar line, hitting it through obstacles that should block the missile or break the lock. (This case is shown in my video.)

Expected behavior:
Flares should break the lock and divert the missile, obstacles and terrain should block the missile or break the lock, and the lock-on indicator should stay visible throughout tracking.

Actual behavior:
Flares don't work against the Igla, missiles hit targets through cover and below radar, and the lock-on indicator disappears.