Inaccurate drop rate for bronze axes on zombies during lost city quest

Description of issue

The lvl 25 zombie (id 76) has iron axe (1349) and bronze axe (1351) as the same weight of 25. the bronze axe should be more common.

Examples of better drop rates from YouTube guides in that time period.

3kc around one minute mark. https://www.youtube.com/watch?v=buEsH-JdSNI

1kc around 7 minute mark. https://www.youtube.com/watch?v=buEsH-JdSNI

2kc around 3:30 minute mark https://www.youtube.com/watch?v=wG8xIlTLJXY

What should have happened

Bronze axe should have the drop rate of 1/2.56.

Reproduction steps (if applicable)