Presumably in hudanimations you have HudHealthBonusPulse either commented out or simply not present.
In the copy of RevHUD I have it has the below
event HudHealthBonusPulse
{
Animate PlayerStatusHealthBonusImage Alpha "255" Linear 0.0 0.2
Animate PlayerStatusHealthBonusImage Alpha "0" Linear 0.2 0.4
Animate PlayerStatusHealthValue fgcolor "bh_HealthBuff" Linear 0.0 0.3
//Animate PlayerStatusHealthValueBG fgcolor "bh_white" Linear 0.0 0.3
Animate PlayerStatusHealthValueSpectator fgcolor "bh_Health" Accel 0.0 0.0
Animate PlayerStatusHealthValueFreezePanel fgcolor "bh_HealthBuff" Accel 0.0 0.0
Animate ShadedBarThin Alpha "0" Accel 0.0 0.0
Animate ShadedBarThinBuff Alpha "255" Accel 0.0 0.0
Animate HealthBarBuff Alpha "255" Accel 0.0 0.0
Animate HealthBarBuff2 Alpha "255" Accel 0.0 0.0
Animate HealthBarBuff Alpha "0" Accel 0.0 0.4
Animate HealthBarBuff Alpha "255" Accel 0.2 0.2
Animate TargetHPBG BgColor "0 185 255 80" Accel 0.0 0.0
Animate TargetHPBG Alpha "255" Accel 0.0 0.1
Animate TargetHPBG Alpha "255" Accel 0.1 0.3
RunEvent HudHealthBonusPulseLoop 0.4
}