When MCMT is included in the mod list, and when you breed two animals together, two babies are spawned.

EDIT: I am so sorry I sent the wrong mod list! I have edited so it is correct! :(
Mod List:

1. buildersaddition-1.16.3-20201028b
2. industrial-foregoing-1.16.5-3.2.14.6-14
3. create-mc1.16.5_v0.3.2g
4. sleeping_bags-1.16.4-1.0.1
5. goldenhopper-1.2.1-1.16.3
6. mcw-doors-1.0.1fix-mc1.16.4
7. FpsReducer-forge-1.24-mc1.16.5
8. titanium-1.16.5-3.2.8.7-22
9. createaddition-1.16.5-20220129a
10. kotlinforforge-1.15.1-obf
11. randompatches-2.4.4-forge
12. MyServerIsCompatible-1.16.5-1.0
13. configured-1.5.1-1.16.5
14. jei-1.16.5-7.7.1.145
15. item-filters-forge-1605.2.5-build.9
16. Hwyla-forge-1.10.11-B78_1.16.2
17. flywheel-1.16-0.2.5
18. cavesandcliffs-1.16.5-7.2.0
19. Powah-1.16.5-2.3.16
20. Xaeros_Minimap_22.1.2_Forge_1.16.5
21. mcw-bridges-1.0.4-mc1.16.4
22. oneplayersleeping-1.16.4-0.0.5
23. jmt_mcmt-1.16.5-0.22.87-modcore
24. cloth-config-4.14.54-forge
25. mcw-paintings-1.0.2-mc1.16.5
26. cavebiomeapi-1.16.5-1.4.2
27. DynamicSurroundings-1.16.5-4.0.5.0
28. OptiFine_1.16.5_HD_U_G8
29. lumberjack-2.1.4
30. mcw-trapdors-1.0.0-mc1.16.4
31. jmt_mcmt-1.16.5-0.22.87
32. mcw-windows-1.0.2-mc1.16.4
33. architectury-1.30.55
34. Mantle-1.16.5-1.6.157
35. observable-0.2.1-forge
36. globalxp-1.16.5-v1.9
37. voicechat-forge-1.16.5-2.2.26
38. Uppers-0.3.2
39. JEIEnchantmentInfo-1.16.4-1.2.1
40. ftb-quests-forge-1605.3.6-build.98
41. XaerosWorldMap_1.20.6_Forge_1.16.5
42. inventoryprofiles-forge-1.16.2-0.4.2
43. cc-tweaked-1.16.4-1.94.0
44. ftb-library-forge-1605.3.4-build.90
45. Lollipop-1.16.5-3.2.9
46. ftb-teams-forge-1605.2.3-build.40

Version: 1.16.5 forge 36.2.26
Config: Default

could you explain more precisely how this happend for us to be able to reproduce the bug ?
we need the mod list with the version and configs